1 files changed, 12 insertions, 0 deletions
diff --git a/src/libexecline/el_vardupl.c b/src/libexecline/el_vardupl.c
new file mode 100644
index 0000000..7583669
--- /dev/null
+++ b/src/libexecline/el_vardupl.c
@@ -0,0 +1,12 @@
+/* ISC license. */
+
+#include <skalibs/bytestr.h>
+#include <execline/execline.h>
+
+int el_vardupl (char const *key, char const *s, unsigned int len)
+{
+  register unsigned int i = 0 ;
+  for (; i < len ; i += str_len(s + i) + 1)
+    if (!str_diff(key, s + i)) return 1 ;
+  return 0 ;
+}